Hmm, tbh, if it was me, I would do everything the day before... but that is just me. The cake will probably be dry if left (could you put that in the freezer?) The meringues might keep for 2 or 3 days but I certainly don't think they will be at their best if you make them Monday to be eaten on Saturday. But that is just my opinion .

Weeeell, Nigella has some fab double chocolate cookies in her book - she makes the dough, bakes half and freezes the rest, cut out, on a tray. Recipe makes 12 huge ones, but I make medium sized ones and get 24.

How about you do this on Monday and freeze and then perhaps bake them on the Thursday, make the cake on Monday and freeze and then on Thursday you just need to make the meringue from scratch?

I could post the biscuit recipe for you.. or where you doing halloweeny ones?